I had NEVER really seen one of these until it showed up at our shop.
I really wish I would have taken more pictures of the process but the owner didn't really require many and this swap happened while we were moving shops.
This car got a Alpina version of an M52B30 (we think...). It had E36 electronics and E46 single vanos head and crazy alpina intake. This was a fairly straight forward swap. We did have to tune this and it was one of the first times tuning MS41.2.